[英]Updating MySQL database using PDO in PHP
到處環顧四周,這使我發瘋,嘗試使用PDO在PHP中使用具有可變大小數組的基本更新,這是我的代碼:
function Database_Update($table,$set,$where) {
$con = DB_PDO_Connect();
//Create bind array that picks up values as they have places made for them
$bind = array();
//Write SET part of statement, with ? as variable places
$prep = "UPDATE $table SET ";
foreach ($set as $key => $value){
$prep .= $key."=?, ";
$bind[] = $value;
}
$prep = rtrim($prep, " ,") . " ";
//Write WHERE part of statment, with ? as variable places
$prep .= "WHERE ";
foreach ($where as $key => $value){
$prep .= $key . "=?, ";
$bind[] = $value;
}
$prep = rtrim($prep, " ,");
var_dump($prep);
echo('<br>');
var_dump($bind);
echo('<br>');
var_dump($table);
try {
$stmt = $con->prepare($prep);
$stmt->execute($bind);
echo $affected_rows = $stmt->rowCount();
//$a_data = $stmt->fetchAll(PDO::FETCH_ASSOC);
} catch(PDOException $e) {
trigger_error('Wrong SQL: ' . $sql . ' Error: ' . $e->getMessage(), E_USER_ERROR);
}
$con = null;
}
在代碼中, $prep
輸出如下所示:
string(138) "UPDATE Test SET Group=?, PartName=?, PartNum=?, NumInstock=?, Shelf=?, NumUsed=?, Distributor=?, DistributorPartNum=?, Cost=? WHERE DBid=?"
$ bind變量如下所示:
array(10) { [0]=> string(0) "" [1]=> string(24) "Bearing C Spherical" [2]=> string(5) "Hello" [3]=> string(1) "5" [4]=> string(27) "Black Bearing Box 2 shelf 3" [5]=> string(1) "0" [6]=> string(3) "FKS" [7]=> string(6) "GE 8 C" [8]=> string(0) "" [9]=> int(6) }
除int的BDid列外,所有列均采用TEXT格式。 Ive的代碼使用未聲明的語句可以平穩運行,但我想我將使用相同的數據和相同的表對其進行更新。
不返回任何錯誤,但不影響任何行。
GROUP
是MySQL中的保留字 ,因此您必須對其進行轉義以在查詢,PDO查詢中使用它,就像在普通查詢中一樣。 反引號將:
因此,您必須更改為以下幾行:
$prep .= "`$key`=?, ";
...
$prep .= "`$key`=?, ";
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